Midmotorsteve

So who votes for each?

Pros for piston that i can think of - hard wearing

Pros for diaphragm - very fast as little inertia no heavy piston to move

all OEM stuff is diaphragm, most aftermarket piston, going to replace my stock valve as i think its knackered, thought i'd upgrade at the same time but now after much reading I don't know what to go for, I'm verging on diaphragm and accepting it may split and need replacing before to long, what do people think??